Removable plug lock means



S. WIENER REMOVABLE PLUG LOCK MEANS Jan. 26, 1960 2,922,298

Filed March 9, 1954 2 Sheets-Sheet 1 Jan. 26, 1960 Filed March 9, 1954S. WIENER REMOVABLE PLUG LOCK MEANS 2 Sheets-Sheet 2 @5mm Q/fyl gg 66.1.69a 901 REMOVABLE PLUG LOCK MEANS Siegbert Wiener, Chicago, Ill. lApplication March 9, 1954, Serial No. 415,005 z5 ciaims. (cn 7o;367)

This application relates to a lock mechanism known to the art as aremovable core lock means, and this application is related to and iscopending withvmy earlier application led October .30, 1948, Serial No.57,555 for a Removable Core Lock Means,` now abandoned.

The general object of my present invention is to improve and simplifythe construction ,of a lock of, this nature, and to render the same morereliable and eilicient in operation.

A more specific object is a new driver pin blocking means that is anintegral part of the lock means.V

Another object is the creation of a removable plug lock means wherein'the plug is directly removable from the lock means without also removingthe Vdriver pinsand the driver pin holding portions of the lockmeans,and wherein no accessory tooly is necessary to accomplishthis plugremoval. f

Another object is the creation of a removable plug cylinder lock meanswherein the plug `is directly removable from the remainder of anassembled lock means that is in operative position and condition withoutthe removal and disassembly of any portion of the lock means other thanthe plug retaining portions thereof. p'

Other and more specific objects will be apparent .from the following'description made in connection with the accompanying drawings. l

In the drawings Figure 1 is a rear view of a removable plug lock con`structed in accordance with my invention.

FigureZ is a transverse section of my lock taken in a plane representedby line 2-2 of vFigure 1, but showing the lock attached to a door.

Figure 3 is a rear inside view of my lock taken in a plane representedby the lline 3- 3 in Figure 2.

Figure 4 is a transverse section of the cylinder portion of the locktaken on the line 4 4 of Figure2.

Figure 5 is a section similar to Figure 4, but showing a different phaseof operation. Y l" Figure 6 is a transverse section of the cylinderportion of the lock taken on the line 6-'6 of Figure'Z.

Figure 7 is a detailed view of one of the driver pins being engaged bythe slide piece.

Figure 8 is a perspective view of the assembled cylinder portion of thelock including the plug, the slide piece and related operating parts.

Figure 9 shows the disassembled cylinder case. Figure l shows the slidepiece and the stoppage member.

Figure 1l shows the adjusting rod.

Figure l2 shows the plug.

Figure 13 is a diflerentrform of cylinder portion showing in partialsection a sectional plug within the cylinder portion.

Figure 14 is a top view of a modified plug showing other shapes of pintumbler channels. y

Figure l shows various types of driver pins.

'nited States Patent ice Figure 16 shows an edge plate that might beused conjunction with the type of cylinder portion shown m Figure 13.

The term cylinder when used in this application with the words portion,lock, and case is used in -its broadest sense in regard to lockscontaining rotating plugs, and does not imply that the item iscylindrical in shape. i

In my drawings similar letters and guresV refer` to `the same or similarparts throughout the several views. A`s

this is a copending application, I am Astarting withthe numeral 50 toavoid possible confusion. I n this application I am using the termremovable plug instead 'of removable core as used in' my earlierapplicationin order to emphasize the diierences between Ymy locks andthe locks previously known to the art. In my descriptions frontdesignatesthat portionk'of ,tlie'part described which, in normal lockoperation, is clos'est to the front of the lock. The front of the lock,of course, is the face of the lock, which face, `whenthe lock is in lposition attached to a door, drawerletc. has a keyhole exposed for theentry of the proper keymfor said lock.

Of course some locks would have more than one front, but the examplesdescribed Yin this application have for convenience been locks with'onlyone front.V i n y Referring to the drawings, Irshow a lock ,comprisingnalock case vhaving a front lock case Yportion 51, and a back lock caseportion 52, whichV back lock case portion 5,2 may be secured to thefront lockV case portion `51 as by rivets 53, and which` back lock casep0rtion52 has an opening 54 of a size and position `suiicient to allowthe plug 55 and the slide piece 71 of the lock to pass through saidopening. This opening'54 duringvnormal operation of the lock is coveredby a removably attached cover 56, which cover is held `in place byscrews57. ,The cover 56 may be near or abutting Ythe plug 55. `,'lhis, cover56, positioned as per above, also stops rearward longitudinal movementin the bore 62 ofV an. unlocked plug 55; The plug 55 is cylindricalV inshape and has a groove 58 around the front of the circumference, so thefront of the plug 55 ts flush withfthe lock`front '59 when the plug `55is fully inserted into the bore 62 of ouy the lock cylinder. This bore62 is overlapped at the `front by a ange 99, which flange v99 blocks theforwardjloigi-v tudinal movement of the plug 55. There is a secondgroove 60 (see Figure 12) around the circumference of the plug 55 at aposition to correspond with` the cutout'. 61 (see Figure 8) across thecylinder case 63. Y

' In this cutout 61y there is apstoppage member 64 with an opening ofpasize to permit the passage of the plug 55 through said opening. VAt theside of this stoppage member 64 there is a threaded shank 65 to whichthe threaded adjusting rod 66 is attached. The adjusting rod 66 inFigure 3 passes through the hole 103 at the right edge of the lock case,but said rod 66 cannot be moved longitudinally because the head 67prevents inward mo-v tion and the bent pin 68, whichhas been insertedinto the'hole 69 and bent prevents outward motion, so that any turningof the rod head 67 results in sidewise movement of the stoppage member64. YThe right edge of the lock case is shown with a countersunk portionsurrounding the hole 103 in order that the head 67 will not protrude. 1fthe lock is of the type shown in Figure 13, the rod 66 is first putthrough the hole 102 in the edge plate shown in Figure 16; the pin 68 isinserted in said hole having been made in registration with the"threaded shank 65 of the lock. The rod 66 is attachedl to the shank .6.5by means of the threads, and then the 3 edge plate 100 is attached meansof fastening devices put through the holes A101. The edge plate 100 thenprevents longitudinal movement of the rod 66. The adjusting rod 66 canbe turned with a screw driver by means of the slot 79, and by turningthe adjusting rod 66 the sideways movement of the stoppage member 64 canbe controlled. The stoppage member 64 also has another opening 70through which a slide piece 71 is placed. The slide piece 71 makescontact with the spool type driver pins 72 at the indentation 50 of saiddriver pins, and the slide piece 71 is of a shape to properly co-operatewith the said driver pins 72 when the said driver pins 72 are in theirrespective alined driver pin channels 93 in non-locking position. Theslide piece 71 can be moved sideways in the slide channel 91 and, if itis so desired, lengthwise in a direction substantially parallel to thealinernent of the driver pin channels 93 by moving slide piece 71rearwards through the opening 70 in the stoppage member 64, best seen inFigures 9 and l0. The rearward movement of the slide piece 71 can becontinued through the Yopening 54 in the back lock case portion 52 afterthe cover 56 is moved out of slide piece blocking position.

- The opening 54 of the back lock case portion 52 is large enough andVin such position that the slide piece 71 can be removed rearwards bothfrom the opening 70 in .the stoppage member 64 and from the slidechannel 91 all the way out of the entire lock construction when thecover 56 has had two of the screws 57 removed, the third screw 57loosened, and the cover 56 has then been moved to a position wherein therearward removal of the slide piece 71 will not be blocked. A good wayto perform rearward removal of the slide piece 71 is, after the cover 56has been put into non-covering position, to put an elongated hook endtool into the lock from the opening 54, and, after inserting the hookedend in front of the slide piece 71, to pull the slide piece 71 backwardsuntil the rear of the slide piece 71 protrudes backwards beyond the'rear of the cylinder case 63; then the slide piece 71 can be pulled outo f the lock by using a grasping tool.

The removability feature of the slide piece 71 makes possible theassembly of the lock by insertion of the stoppage member 64 into thecutout 61 of the cylinder case 6 3 from the side opposite the slidechannel 91. After the stoppage member 64 is in proper position in thecutout 61, the slide piece can be inserted into the opening 70` in thestoppage member 64. Obviously it is also possible to operate the lock asa lock with the slide piece omitted from the lock construction.

It, however, is not necessary to always make the lock means in such amanner that the slide piece 71 can be separated from the stoppage member64. These two parts can be combinedV as one piece, designated acomblnation retainer, capable of performing both the driver pin holdingand plug retaining functions.

j The key 73 operates the lock. To remove the plug 55, the bow 74 of thekey 73 is first detached by any suitable means from the shankl 78 of thekey at about the place indicated by the broken line 75 in Figure 2. Theshank 78 portion of the cut key is then inserted into the keyway 76 inthe usual manner, thereby unlocking the plug S for arcular movement. Thestoppage member64, and with it the slide piece 71, is then moved intothe driver pin holding position (best seen in Figure 5) by turning theadjusting rod 66 until the slide piece holds tgl; driver pins 72 intheir respective driver pin channels with the driver pins 72, part ofthe stoppage member 64 extends into the groove 60, thereby blocking thelongttudlnal movement of the plug 55. But when the slide piece 71 1sholding the driver pins as is shownin- Figure to the door or the like'byy 5, the opening 80 is in position to allow the plug 55 to Cil passthrough said opeing.

The next procedure in removing the plug 55 from the lock after thestoppage member 64, and with it the slide piece 71, have been moved intothe driver pin holding position, is to move the cover 56. This can bestbe done by removing two of the screws S7 and loosening the third screw57. By suicient movement of the cover 56 in either direction, the plugv55 will become fully exposed.

The plug 55 is then removed from the bore 62 by exerting slight pressureon the front of the plug 55. As can readily be seen, the plug and theplug alone then comes out of the bore 62 without the driver pins 72 orthe driver pin springs 92 coming out of their respective driver pinchannels 93. A

The shank 78of the key 73 can then be easily removed from'the plug 55,and the combination of the plug can be changed in the usual manner.

When reinserting the same plug 55 or a substitute similar size anddesign plug, the reverse procedure is used, except that it' is notnecessary to have a key shank in the keyway of the plug. The pintumblers would be in their lowest positions in the plug, and the onlything to be careful about it is to be sure the pin tumblers would notspill during the plug insertion.

However, if the lock has been designed to use the type of-driver pinwherein the indentation is longer than the depth of the key bitting,such as driver pin 90a having the indentation 90b, as shown in Figure15, it is not necessary to remove the bow 74 from the shank 78 of thekey to effect the plug removal. In this case the slide piece 71 willlimit only downward movement of the driver pins, so that after the slidepiece 71 is put into driver pin holding position, the key 73 can bepulled out from the keyway 76. Then the plug is removed in the mannerpreviously described.

It is not necessary that the fastening devices, other parts, relativepositions, etc., be exactly as shown on my drawings.

For example, in a lock having conventional straight sided driver pins,any shape slide piece that would retain the driver pins intheirYrespective driver pin channels While the lock is in unlockedcondition could be used. In Figure 13 I use the same principles for anight latch type lock cylinder. This lock cylinder has a sectional plugconsisting of a back section 83 and a front section 32, which frontsection has a flange 85 at the front of its circumference. Movement ofthe back section 83 is controlled by the front section 82 by way of thepins 86. In this lock cylinder thefront section S2 of the plug isremovable through the' front of the lock, and it is not necessary to cutthe key to accomplish the removal of said front section. Interchangingfront sections is similar to interchanging plugs as decribed earlier,except that with the front ections, the key is used to pull out thefront sectionfrontwards from the bore.

It is not intended'to limit the driver pins of this invention to spooltype driver pins. Driver pins of any other workable design may be used.

Figure 14 shows a modified plug having a variety of dierently shapedchannels 87, 88, S9, and 90, in which channels can be inserted thedriver pins 87a, 88a, 89a, and 90a, shown in Figure 15.4 As these pinsand channels for them are not cylindrical, these driver pins need benotched only on their slide piece engaging side as per notches 87b, 88b,89h, and 90b.

While applicant has thus described the invention generally, and haspointed outV certain important features of its construction, additionalimportant features will be apparent upon reading the specification', andthese additional features will be covered in the claims appended hereto.It should also be understood that the conception on which this inventionis based may readily be embodied in structures vother than those thatare shown and de- The term lock means designates not only a lock, but

also those constructions wherein portions of the object being locked areused comparable with lock parts, etc.

'Ihe term non-locking position designates that position of the partsinvolved that allows the plug to be rotated.

The terms plug and plug section as used in this application, and themeanings of these two terms are interchangeable. The term` plug sectionis usually used where a front removal section of a sectional plug couldalso be used, but both terms also include any other plug or type of plugthat can be used. l

Having thusA disclosed my invention, I claim:

l. Lock means comprising aV housing having a front wall and a back platesecured to the front wall, said back plate having a portion spaced fromthe front wall, a cylinder case having a bore, said cylinder case beingjoined to the front wall and said cylinder case extending into thehousing at an aperture in the front wall, a releasable key operated plugwithin said bore, said back plate portion having an openinginregistration with said bore, and said opening being of `a size-foraiording passage of a cylinder having the largest diameter possible fora cylinder that can pass intosaid bore, and 1a `movable closureV closingthe opening in said portion, said closure being movable from its closingposition, and said closure bearing against the end of the plug when theclosure is inclosing position. Y

2. Lock means comprising a housing having a front wall and a back platesecured to the front wall, -said front wall having an aperture, acylinder case having a bore, said cylinder case being joined to thefront wall and said cylinder case extending into the housing at saidaperture, a releasable key operated plug Within said bore, said backplate having a portionspaced from the front wall, said portion having anopening of a size for affording passage tof a cylinder having.therlargest diameter possible for a q"cylinder that can `pass into said'bo-re, said opening being in registration with said bore, and plugretaining means, said plug retaining means beinganelement positioned insaid lock means in a manner whereby a portion of said element can bemoved into and out ofthe path :through der case having a bore, curvedwalls surrounding said:

bore, said cylinder case being joined to Athe front wall and saidcylinder case extending into the housing at an aperture in the frontwall, a releasable key operated plug within said bore, said portionhaving an opening in registration with said bore, and said opening beingof a size for alfordiug passage therethrough of a cylinder having thediameter size of a little less than the width apart of diametricallyopposite curved walls surrounding said bore, and relative to saidcylinder case a movablymounted stoppage member, said stoppage memberbeing movable in a direction transverse to the axis of said plug, saidstoppage member being positioned on the lock means along the paththrough which said cylinder can pass into said bore when said plug isnot in said bore, said stoppage member normally being in a` positionwherein. said stoppage member extends into said path blocking movementof said plug fro-m said bore, and said stoppage memberbeing changeabletoa position wherein said stoppage member no longer extends into the pathand which positionin 'a phase of operation allows removal of said plugfrom'the bore when Vsaid lockmeans is in assembled, attached, operating,and unlocked condition. Y

.4. A` locking device comprising a front lock case portion, a back lockcase portion, a cylinder lock mounted at an aperture of said front lockcase portion, said cylinder lock having a bore, a removable plug in saidbore, said cylinder lock having spring pressed tumbler portions, andsaid cylinder lock having within said locking device whilefsaid rlockingdevice is capable of performing its normal locking and unlockingfunctions integrated means whereby said bore can in a phase of operationbe kept clear of said spring pressed tumbler Yportions during plugremoval and plug insertion operations, said back lock case portionhaving an opening of a size and location suicient for affording passageof said plug, and manipulatable plug retaining means, said plugretaining means normally being ina position whereby holding engagementwith said plug is made so that said plug is held in its normal operatingposition within the bore, but which plug retaining means can also be somanipulated that the said plug retaining means will allow release of theholding engagement of said plug thus enabling said plug to be removedfrom the bore. Y v

5. A pin tumbler lock means comprising a cylinder case having a bore,alined driver pin channels, and a slide channel, said slide channelbeing transverse to and communicating with driver pin channels, a' pintumbler `plug 'in said'bore, driver pins in said driven pin channels,

andY relative to said cylinder c ase a movably mounted slide piece insaidslide channel,said slide piece being manipulatable towardV andfr'omthe driver pin channels in directions transverse to the Valinement of`said driver pin channels, `said-'slide piece normally being out ofVcontact with the driver pins while said slide piece is in said slidechannel and while the lock means is performing its locking` andunlockingfunctions, but which slide piece is capable of manipulation until it isin driver pin contact, making holding engagement with said driver pinsat a time when said plug is Vin unlocked condition thereby allowingV theunlocked plug to be removed from the bore lvavitliout the driver Ipinsbeinglforced into the emptied ore. f Y

6. A lock comprising a cylinder case having a bore i'orv a pin tumblerplug, d river pin channels, driver pins in said driverV pin channels, apin tumbler plug within the bore, said plug being'r'emovable rearwardsfrom the bore, integrated means contained in said cylinder case whilesaid lock is capableofgperforming its locking and unlocking functionswhereby in a phase of operation y the driver pins'are kept clear-A ofthe bore during plug removal and during plug insertion operations, alock front that overlaps a portion of saidplug, pin tumbler channels insaid plug, said pin tumbler channels being positioned to correspond withthe positions of said driver pin channels, a back lock case portionhaving, an opening of a size and location for aiording passage of theplug, and a releasable plug retaining means other than the driver pinsand other than Vthe pin tumblers releasably retaining Said plus: L Y Y7. A- pin tumbler lock means comprising a cylinder case having a bore,alined driver'pin channels, and a slide channel, said slide channelbeing transverse to and communicating with driver pin channels, a pintumbler plug in said bore, driver pins in said driver pin channels, andrelative to said cylinder case, a movably mounted slide piece in saidVslide channel, said slide piece normally being out of contact with thedriver pins while said slide piece is in the slide channel and while thelock in a direction transverse `to the alinement of saiddriver pinchannels until said slide piece isv no longer in driver pin contact.

8.`An integrated pin tumbler lock meansv comprising a cylinder casehaving a bore, alined driver pin channels, and a slide channel, saidslide channel being transverse to and communicating with driver pinchannels, a pin tumbler plugin said bore, driver pins in said driver pinchannels, relative to said cylinder case a movably mounted slide piecein said slide channel, and a stoppage member connected to said slidepiece, said stoppage member releasably retaining the plug in the bore,said stoppage member normally being in a position wherein a portion ofsaid stoppage member intercepts movement of the plug from the bore, andthe position of said stoppage member relative to said cylinder case canbe varied in a phase of operation by manipulation that causes movementin directions transverse to the alinement of said driver pin'channelsuntil positions are reached wherein said stoppage member does notintercept movement of the plug from the bore, and the position of saidstoppage member relative to said cylinder case can be varied bymanipulation that causes movement in reverse directions until saidstoppage member and saidicylinder case are again in their normalrelative positions. f t

9. A pin tumbler plug lock means as set forth in claim 8, wherein achange in the relative. positions of' the stoppage member and thecylinder case will also cause a similar change in the relative positionsof said slide piece and said cylinder case, and said slide piece beingso connected to said stoppage member that'when said plug is in unlockedcondition and'when saidstoppagemember does not intercept movement of theplug from the bore, said slide piece, in a phase of operation, will bemaking driver pin holding engagement' at positions Where, said slidechannel communicates with driver pin channels;V

10. A pin tumbler lock means as set forth in claim 9, wherein there is ameans whereby. the positionof said stoppage member relative to said'cylinder case can'be varied by manipulation which means, extends to aperiphery of the lock means and which means can be operated without thedisassembly of thelock means. v

11. In a lock means comprising a cylinder case having arbore, alineddriver pin channels, and` a slide channel, said slide channel beingtransverse to and communicating with said driver pin channels, and saidslide channel extending to the rear of said cylinder case, a removableplug in said bore, driver pins in said driver pin channels,

and a stoppage member having an aperture of a size toV permit passage ofsaid plug, said stoppage member havingV a'relationship with saidcylinder case whereby one is movablein relation to the other in adirection transverse to the alinement of said driver pin channels, saidstoppage member in a phase of operation being manipulatableV to aposition wherein said stoppage member allows removal of said plug whensaid plug is in unlocked condition; a slide piece in said slide channel,said slide piece being removable from and insertable into said slidechannel, said stoppage member and said slide piece having means wherebysaid slide piece is connected to and held in position in said slidechannel by said stoppage member, said slide piece being capable ofmaking holding engagement with said driver pins at locations where theslide channel communicates with driver pin channels. l2. In a lock meanscomprising a cylinder case having a bore and driver pin channels, areleasably retained plug in said bore, the walls of said driver pinchannels having openings, and driver pins in said driver pin channels, amovable plug retaining means having a driver pin Vimpeding portionshaped to make holding contact with said driver pins, said holdingcontact being at the openings in the walls of the driver pin channels,said plug retaining means also having a plug retaining portionreleasably retaining the plug within the bore.

, 13. A lock cylinder comprising a casing having a bore and driver pinchannels, the walls of said driver pin channels having openings, areleasably retained plug in said bore, driver pins in said driver pinchannels, a movable slide piece shaped to enable said slide piece tomake holding contact with said driver pins, said holding contact beingat the openings in the walls of said driver pin channels, and relativeto said casing a movably mounted stoppage member, the slide piece beingconnected to said stoppage member and coacting with said stoppagemember, which stoppage member releasably retains said plug within thebore, said stoppage member normally being in a condition which impedesmovement of the plug from the bore, but which stoppage member can bechanged from its normal plug movement impeding condition, therebyallowing removal of the plug from its bore.

14. A lock means comprising a cylinder case having a bore and driver pinchannels, the walls of said driver pin channels having openings, driverpins in said driver pin channels, a releasably retained plug section insaid bore, amovably mounted driver pin impeding element, said driverpins and said element having engaging portions located in positions sothat holding engagement can take place between the portions of saidelement and the portions of said driver pins, said holding engagementbeing capable of preventing movement of said driver pins from theirrespective driver pin channels while the plug section is in unlockedcondition, a movably mounted stoppage member connected to said element,Vsaid stoppage member having an aperture of a size and position thatallows passage of said plug section therethrough at a time when saidplug section is in unlocked condition simultaneously with said portionsbeing in holding engagement, yet which stoppage member is so shaped thatin normal position, said stoppage member blocks passage of said plugsection from said bore, said stoppage member and said element being sojoined and being so variable in relation to said driver pins and saidplug section that when said stoppage member allows passage of saidplug'section past said stoppage member, saidportions will be in holdingengagement, and a movement controlling means for controlling themovements that cause variance in relationship between the combination ofsaid stoppage member and said element, and said driver pins andV saidplug section, said movement controlling means being for the purpose ofso controlling movement that the element and the stoppage member will bein plug section release position only when it is desired to have them inthat position.

15. A lock means as set forth in claim 14, wherein the movementcontrolling means consists of a rotatably mounted rod having a threadedportion plus a shank attached to the stoppage member and extending fromthe stoppage member, said shank having a mating thread thereon forengagement with the threaded portion of said rod.

16. A lock comprising a cylinder case having a bore and alined driverpin channels, the walls of said driver pin channels having openings, aplug section in said bore, said plug Ysection having a groove in itscircumference, said cylinder case having a cutout in a positioncorresponding to the groove in the plug section, driver pins in saiddriver pin channels, a stoppage member normally extending into thegroove of said plug section, a slide piece coacting with said stoppagemember, said slide piece normally being out of contact with said driverpins, and said slide piece and saidd river pins having engagingportions, said stoppage member and said slide piece having relationshipto said cylinder case, said relationship being capable of change bymovement of related parts in directions transverse to the alinement ofsaid driver pin channels until said stoppage member no longer extendsinto said groove and until said engaging portions are in holdingcontact.

17. In a lock comprising .a cylinder case having a bore and driver' pinchannels, the walls of' said driver pin channels having open spaces, aplug in said bore, driver Y pins in said driver pin channels, a movabledevice comprising a bar portion joined to a plate section, said barportion being shaped so when said plugris in unlocked condition, saidbar section can be moved into holding contact with said driver pins atthe open spaces in the walls of said driver pin channels, the barportion vbeing joined to said plate section in such relationship 1'8. Ina lock as set forth in claim 17, wherein there is also a movementcontrolling means whereby movement of the device is controlled, saidmovement controlling means extending to a periphery of the lock.

19. A pin tumbler lock means comprising a lock case having an aperturein a wall of said lock case, said aperture being for the purpose ofallowing a manipulation controlling means to be exposed at a peripheryof the lock means, a cylinder case having a bore and driver pinchannels, said driver pin channels having openings in the walls thereof,a pin tumbler plug in said bore, said pin tumbler plug being removablefrom the bore, driver pins in said driver pin channels, relative to saidcylinder case a movably mounted slide piece to releasably hold thedriver pins in their respective channels during the plug removal andplug insertion operations, a movably mounted stoppage member to coactwith said slide piece, said stoppage member normally being in a positionwherein said stoppage member retains said plug in the bore, but saidstoppage member is manipulatable to a position and condition whereinsaidy stoppage member does not retain the plugin the bore, and saidstoppage member is so connected to said slide piece that when saidstoppage member is manipulated to such position, said slide piece isalso manipulated until said slide piece reaches a position and conditionwherein said slide piece makes holding engagement with said driver pinsat the openings in the walls of said driver pinchannels causing saiddriver pins to be retained withinY their respective driver pin channels,and a manipulation controlling means that is exposed at a periphery ofthe lock means through said aperture. Y

20. In a key operated pin tumbler lock, a cylinder case having driverpin channels and a bore, driver pins in said channels, a removable plugin said bore, a keyway in said plug, and a driver pin blocker thatinteracts with the sides of said driver pins, said driver pins havingindentations on their sides for interaction with said driver pinblocker, said indentations 'being of such length that a key can bewithdrawn from the keyway when the driver pin blocker is in blockingposition and before the plug is removed from said bore.

2l. A lock comprising a casing having a bore and driver pin channels,the walls of said driver pin channels having openings in the sidesthereof, driver pins in said driver pin channels, a plug section in saidbore, said plug s'ection having a groove on its circumference, a cutoutin said casing, said cutout extending from said bore at the position ofthe groove on the circumference of the plug section contained in saidbore, a movably mounted combination retainer comprising a driver pinimpeding portion, said portion being of a shape and size to enable saidportion to make holding contact with said driver pins at the openings inthe walls of said driver pin channels, said portion normally being outof contact with said driver pins, and said combination retainer alsocomprising a section connected to said portion, said section beingpositioned in the cutout and normally extending into thergroove on theplug section circumference, in which position said section retains saidplug sectionwithin the bore, yet which combination retainer, whenthe'lock is in unlocked condition, can be manipulated into driver pinholding contact position, and in which position the section which ismanipulated in connection with the manipulation of the driver pinimpeding portion will be wholly out of the groove in said circumferenceon said plug section, thereby allowing said plug section to be freelyremovable from the bore.

272. A lock comprising a'casing having a bore, aY plug section movablein said bore,tumbler portions in openings in said casing and plugsection, said tumbler portions being settable by a bitted key adapted tobe inserted in a keyway Vformed in said plug section, abutment surfaceson said tumbler portions, said abutment surfaces being for the purposeof and being at a location for making contact with an impeding device,open spaces in the walls of said openings, an impeding device capable oflmaking holding contact with the abutment surfaces, said holdingcontactbeing at said open spaces, said impeding device having a spacerelationship with the tumbler portions so that the space between thetumbler portions and the impeding device can be varied, means forVvarying the space between the impeding device and the tumbler portions,said impeding device being adapted when in impeding position to impedetumbler portions in their respective openings, said tumbler portionshaving longitudinal indentations adjacent to said abutment surfaces andextending in a direction toward said bore, said iudentations being of alength greater than the depth of the key bittings that are insertableinto the keyway to a greater depth than the location of the respectivetumbler portion relative tothe keyway.

23. A lock comprising a casing having a bore, a plug section movable insaid bore, said casing and said plug section having openings, theopenings of the plug section corresponding with the openings in thecasing, tumblers in openings in said casing and plug section, a retainermounted so that the position of said retainer relative to said plugsection can be varied in directions transverse to the axis of the plugsection, and said retainer being adapted when in a retaining position toretain said plug section in said bore, and said retainer being adaptedwhen in release position to allow release of said plug section from saidbore, said lock having a channel so located that said channelcommunicates with tumbler containing openings, an impeding device insaid channel, said channel being considerably larger'v than saidimpeding device,

said impeding device being so mounted that said irnpeding device canmake holding contact with said tumblers, and said impeding device beingso mounted that the space relationship between said impeding device andthe tumblers can be varied, and means whereby the space relationshipsbetween the retainer and the plug section and between the impedingdevice and the tumblers can be varied, the relationship of the impedingdevice to the retainer being such that the impeding device can impedethe tumblers when the plug section is in unlocked c011- dition, and theretainer is in release position and the relationship, size, and shape ofsaid channel, said impeding device, and said tumblers being such thatsaid impeding device is capable of remaining in said lock out of holdingcontact with the tumblers while the lock is in attached and assembledcondition and while the lock is performing its normal locking andunlocking functions. 24. In a lock having a casing, said casing having abore, a plug section in said bore, said casing and plug section havingopenings, the openings in the plug section corresponding with theopenings in said casing, tumblers in openings in said casing and plugsection, said lock having a channel that communicates with the openingsin the casing, a tumbler impeding device in said channel, said tumblerimpeding device being considerably smaller than said channel, and saidtumbler impeding device being ofsuch shape and having-such relationshiplwith the other portions of said lock that `said impeding device iscapable of making holding .engagement with tumblers at locations wheresaid channel communicates with openings in said casing when said lock isin unlocked condition, and which tumbler impeding device is capable ofbeing moved out of holding engagement and still remain in the lock whilethe lock is in assembled and attached condition and while the lock isperforming its normal locking and unlocking functions.

25. In a lock as set forth in claim 24, in which `there is also amovement controlling means connected to said tumbler impeding device,said movement controlling means extending to a periphery of the lock inorder that said tumbler impeding device can be moved into and out ofholding engagement in an assembled and attached lock Without requiringdisassembly and detachment of the lock.

"l2 References Citedinthe file of this patent UNITED STATES PATENTS588,026 Stadtmuller Aug. l0, 1 897 1,004,904 Rees Oct. 3, 1911 1,309,135Honeywell et al July 8, 1919 1,334,292 Cox Mar. 23, 1920 1,735,868Klingel Nov. 19, 1929 1,913,963 Shinn June 13, 1933 2,007,143 Keil July2, 1935 2,012,911 Hurd Aug. 27, 1935 2,012,996 Jacobi Sept. 3, 19352,014,233 Keil Sept. 10, 1935 2,059,129 Maxwell et al. Oct. 27, 19362,295,737 Johnstone Sept. 15, 1942 OTHER REFERENCES The Manual ofLocksmithing, page 104, 1941 (copyrighted), by S. A. McLean, Denver,Colo.

